Oxygen-Assisted Tailoring of Evaporated PbS Hole Transport Layer for Highly Efficient Antimony Sulfide Solar Cells.

Antimony sulfide (SbS) is regarded as one of the potential candidates for the next generation of photovoltaic absorber due to its excellent photoelectric properties. However, the selection and optimization of the hole transport layer (HTL) is still a major challenge for efficiency breakthrough of the SbS solar cells. In this work, lead sulfide (PbS) is deposited as a HTL of the SbS device by thermal evaporation for the first time.